package cn.wolfcode.luowowo.comment.service.impl;

import cn.wolfcode.luowowo.comment.domain.TravelComment;
import cn.wolfcode.luowowo.comment.query.TravelCommentQuery;
import cn.wolfcode.luowowo.comment.repository.ITravelCommentRepository;
import cn.wolfcode.luowowo.comment.service.ITravelCommentService;
import com.alibaba.dubbo.config.annotation.Service;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.domain.Page;
import org.springframework.data.domain.PageImpl;
import org.springframework.data.domain.PageRequest;
import org.springframework.data.domain.Sort;
import org.springframework.data.mongodb.core.MongoTemplate;
import org.springframework.data.mongodb.core.query.Criteria;
import org.springframework.data.mongodb.core.query.Query;
import org.springframework.util.StringUtils;

import java.util.Date;
import java.util.List;

@Service
public class TravelCommentServiceImpl implements ITravelCommentService {
    /**
     * spring-data 会自动注入ITravelCommentRepository实现类
     *
     * ITravelCommentRepository 接口继承MongoRepository
     * 拥有了 分页,排序,crud基本功能
     *    底层实现 : AOP 操作--动态代理
     */
    @Autowired
    private ITravelCommentRepository repository;
    //使用较为底层的贾琏欲执事, 实现mongodb操作, 这里用它来实现较为复杂操作
    @Autowired
    private MongoTemplate mongoTemplate;
    @Override
    public TravelComment saveOrUpdate(TravelComment comment) {
        if(!StringUtils.hasLength(comment.getId())){
            //创建
            comment.setCreateTime(new Date());
        }
        //评论的评论
        String refId = comment.getRefComment().getId();
        if (StringUtils.hasLength(refId)){
            TravelComment ref = repository.findById(refId).get();
            comment.setRefComment(ref);
        }
        /*  if(comment.getType() == TravelComment.TRAVLE_COMMENT_TYPE){
            Optional<TravelComment> op =
                    repository.findById(comment.getRefComment().getId());
            comment.setRefComment(op.get());
        }*/
        repository.save(comment);
        return comment;
    }
    /*@Override
    public void save(TravelComment comment) {
        if(!StringUtils.hasLength(comment.getId())){
            //创建
            comment.setCreateTime(new Date());
        }
        String refId = comment.getRefComment().getId();
        if (StringUtils.hasLength(refId)){
            TravelComment ref = repository.findById(refId).get();
            comment.setRefComment(ref);
        }
        repository.save(comment);
    }*/
    @Override
    public Page query(TravelCommentQuery qo) {
        //查询条件
        Query query = new Query();
        if(qo.getTravelId() != -1){
            //攻略id条件
            query.addCriteria(Criteria.where("travelId").is(qo.getTravelId()));
        }
        //查总数
        long count = mongoTemplate.count(query, TravelComment.class);
        if (count == 0){
            return Page.empty();
        }
        //select count(id) from xxx where ....
        //select * from xxx where .... order by
        //参数1:当前页, 注意, 从0开始
        //参数2:每页显示条数
        //参数3:排序规则, 参数a: 表示倒序  参数b:哪个字段
        PageRequest pageable = PageRequest.of(qo.getCurrentPage() - 1, qo.getPageSize(),
                Sort.by(Sort.Direction.DESC, "createTime"));
        query.with(pageable);
        //查某一页  List
        List<TravelComment> list = mongoTemplate.find(query, TravelComment.class);
        // PageImpl  Page接口实现类
        return new PageImpl(list, pageable,count );
    }

    @Override
    public Long getCount(Long travelId) {
       Query query = new Query();
       if (travelId!=null){
           query.addCriteria(Criteria.where("travelId").is(travelId));
       }
        long count = mongoTemplate.count(query, TravelComment.class);
        return count;
    }

}
